Desalination rate = (1 – water salinity / influent salinity) × 100%
The desalination rate of the membrane element has been determined at the time of its manufacture. The desalination rate depends on the density of the ultra-thin desalting layer on the surface of the membrane element, and the desalting layer is denser and the water yield is lower. RO desalination of different substances mainly by the material structure and molecular weight of the decision, high-priced ions and complex single-ion desalination rate of more than 99%, monovalent ions such as: sodium ions, potassium ions, chloride desalination rate slightly lower , But also can be more than 98% (the longer the membrane, the more the number of chemical cleaning, reverse osmosis membrane desalination rate lower); for molecular weight greater than 100 organic removal rate can also be over 98%, but molecular weight Organic matter removal rate of less than 100 is low.
